#!/usr/bin/env bash
# Copyright (c) 2022 Huawei Technologies Co.,Ltd.
#
# openGauss is licensed under Mulan PSL v2.
# You can use this software according to the terms and conditions of the Mulan PSL v2.
# You may obtain a copy of Mulan PSL v2 at:
#
#          http://license.coscl.org.cn/MulanPSL2
#
# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
# See the Mulan PSL v2 for more details.

# ------------Utils------------
function die() {
  echo -e "FATAL: $1"
  exit 1
}

function extract_libname() {
  # Split real library name.
  line=$1
  tmparr=(${line//==/ })
  libname=${tmparr[0]}
  tmparr=(${libname//>=/ })
  libname=${tmparr[0]}
  tmparr=(${libname//<=/ })
  libname=${tmparr[0]}
  tmparr=(${libname//~=/ })
  libname=${tmparr[0]}
  # trim
  libname=$(echo $libname | sed 's/ *$//g')
  echo $libname
}

function get_alias() {
  # Split the input string using '#',
  # take the last element, and trim leading/trailing whitespace
  local parts=$(echo "$1" | cut -d '#' -f2 | xargs)

  # Split the resulting string using ',', and return the resulting array
  echo "$parts" | tr -d ' ' | tr ',' '\n'
}

# ------------Main Process------------
ABSPATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DBMIND_PATH=${ABSPATH}/dbmind

ORIGIN_PATH=$(pwd)
cd $ABSPATH

# Check whether Python has been installed onto the OS.
source ${ABSPATH}/constant

# Set local Python VM if we have.
export PATH=${ABSPATH}/python/bin:$PATH
PYTHON=$(which python3)
if [[ "$?" != "0" ]]; then
  die "Not found the Python environment."
fi

# Check for the Python version.
$PYTHON -c "import sys; exit(${MIN_PYTHON_VERSION} <= sys.version_info[:2] <= ${MAX_PYTHON_VERSION})"

if [[ "$?" != "1" ]]; then
  die "Not supported Python (${PYTHON}) version. At least Python ${MIN_PYTHON_VERSION}"
fi

# Run set command
if [[ $1 == "set" ]]; then
  cd $ORIGIN_PATH
  echo "WARN: The SET operation will not detect the integrity of the module, please install the module in advance."
  $PYTHON $DBMIND_PATH/ $@ &
  exit $?
fi

cd $ABSPATH

# Check for dependencies
## Firstly, get the machine architecture so that determine different requirement files.
if [[ -f "${DBMIND_PATH}/requirements-x86.txt" ]]; then
  REQUIREMENT_PATH=$DBMIND_PATH
else
  REQUIREMENT_PATH=$DBMIND_PATH/..
fi

machine=$(uname -m)
if [[ "$machine" =~ "x86" ]]; then
  requirements=$REQUIREMENT_PATH/"requirements-x86.txt"
else
  requirements=$REQUIREMENT_PATH/"requirements-aarch64.txt"
fi

## Secondly, check whether each library has been installed.
if [[ $PYTHONPATH ]]; then
  echo "NOTICE: You have set the variable PYTHONPATH. DBMind ignored it."
fi
export PYTHONPATH=${ABSPATH}/3rd
installed_list=$($PYTHON -m pip list --disable-pip-version-check)
while read line; do
  libname=$(extract_libname $line)
  # skip comment
  if [[ $libname == "#"* ]] || [[ $libname == "" ]]; then
    continue
  fi

  found=$(echo $installed_list | grep -i "$libname")
  if [[ $found == "" ]]; then
    # try to look for alias
    for ali in $(get_alias "$line"); do
      found=$(echo $installed_list | grep -i "$ali")
      if [[ $found != "" ]]; then
        break
      fi
    done
  fi

  if [[ $found == "" ]]; then
    die "Require dependency ${libname}. You should use pip to install it, following:\n
        ${PYTHON} -m pip install -r ${requirements}"
  fi
done <$requirements

# Furthermore, if users want to use several components, he should install optional dependencies.
## e.g., gs_dbmind component sqldiag ...
optional_reqs=$REQUIREMENT_PATH/"requirements-optional.txt"
if [[ "$1" == "component" ]] && [[ "$2" == "sqldiag" || "$2" == "xtuner" ]]; then
  while read line; do
    libname=$(extract_libname $line)
    # skip comment
    if [[ $libname == "#"* ]] || [[ $libname == "" ]]; then
      continue
    fi

    found=$(echo $installed_list | grep -i "$libname")
    if [[ $found == "" ]]; then
      echo -e "NOTICE: Maybe you need dependency ${libname} while using this component. You should use pip to install it, following:\n
            ${PYTHON} -m pip install -r ${optional_reqs}"
    fi
  done <$optional_reqs
fi

set -f
for arg in "${@}"; do
  if [[ ${arg:0:1} != '-' ]]; then
    arg=$(echo $arg | sed 's/"""/\\\\\\"\\\\\\"\\\\\\"/g')
    arg=$(${PYTHON} -c "import shlex;print(shlex.quote(\"\"\"$arg\"\"\"))")
  fi
  _args=$_args" "$arg
done

cd $ORIGIN_PATH
eval $PYTHON $DBMIND_PATH/ $_args
